ci(aio): move e2e tests to optional job (#20178)

scripts/ci/test-aio-optional.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+set -u -e -o pipefail
+
+# Setup environment
+readonly thisDir=$(cd $(dirname $0); pwd)
+source ${thisDir}/_travis-fold.sh
+
+# run in subshell to avoid polluting cwd
+(
+  cd ${PROJECT_ROOT}/aio
+  # Run e2e tests
+  travisFoldStart "test.aio.e2e"
+    yarn setup
+    yarn e2e
+  travisFoldEnd "test.aio.e2e"
+
+)